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year | consumption | change |
1980 | 1.10 | NA |
1981 | 2.50 | 127.27% |
1982 | 2.40 | -4.00% |
1983 | 2.70 | 12.50% |
1984 | 4.40 | 62.96% |
1985 | 4.50 | 2.27% |
1986 | 4.50 | 0.00% |
1987 | 4.50 | 0.00% |
1988 | 4.60 | 2.22% |
1989 | 4.70 | 2.17% |
1990 | 4.90 | 4.26% |
1991 | 4.90 | 0.00% |
1992 | 5.10 | 4.08% |
1993 | 4.60 | -9.80% |
1994 | 4.70 | 2.17% |
1995 | 4.80 | 2.13% |
1996 | 4.80 | 0.00% |
1997 | 4.80 | 0.00% |
1998 | 4.90 | 2.08% |
1999 | 4.90 | 0.00% |
2000 | 5.20 | 6.12% |
2001 | 5.20 | 0.00% |
2002 | 5.30 | 1.92% |
2003 | 5.30 | 0.00% |
2004 | 5.20 | -1.89% |
2005 | 5.50 | 5.77% |
2006 | 5.60 | 1.82% |
2007 | 5.10 | -8.93% |
2008 | 5.10 | 0.00% |
2009 | 5.30 | 3.92% |
2010 | 5.30 | 0.00% |
2011 | 5.30 | 0.00% |
2012 | 5.30 | 0.00% |
2013 | 5.30 | 0.00% |
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